Lamp-terminal.



No. 665,459; Patented Jan. 8, laul. G. B. PAINTER.

LAMP TERMINAL.

(Appiication filed June 20, 1898.)

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UNITED STATES PATE F played in the lamp-base. however, will be betterunderstood from the v GEORGE E. PAINTER, 'OFSCHENEOITAIDY, NEW YoRK,ASSIGNOR TO THE GENERAL ELECTRIC COMPANY, OF NEW YORK.

LAM P-TE/RMINAL.

SPECIFICATION forming part of Letters Patent No. 665,459, dated January8, 1901. Application filed \Tnne20i1898. Serial No. 683,908. (No modelhminals of incandescent lamps, by means of which they are brought intocircuit with the 1 source of electric supply. 7

It has for its object'to provide a cheap and good pin-terminal, socalled, for that form of these lamps in which one of "the lead-in wiresis-connected to a central pin embedded in a body of insulating material,the second terminal being connected to the outer sleeve orring, as inthe-well-known Westinghouse lamp.

For the purposes'of this invention I take a flat strip ofmetal and stampthe pin. from it in a wayto-be presently more fully described, at thesame time flaring the sides of the pin, so that it afiordsa secureanchorage in the plaster-of-pari's or other materialem- The invention,

, accompanying drawings, in whic-h Figure 1 is a perspective view ofthe. strip from which thepin ismade. Fig. 2 is aiview, upon an enlargedscale, of the pin after completion;--and "Fig-3 is a section of a lamp,showing thepin in place. I

E inFig. l is a strip of conductingmetal, preferably brass, providedwith a central hole e, thepurpose of which will presiintly be explained.This-is the blank from which the pin E is; formed.

In Fig.'-2,E is the pin, whicu, consists of a cylindrical body- E andflaring ends'E', with a slit E separatingthem. The

' end of the pinis slightly cupped,'as at e in Fig. 3,'and-a hole 6 isleft in the center-of the cup. r In Fig, 3, B B are the lead-in-wires ofthe lamp A. O is the outer terminal of the lamp,

to which the leading-in wire 13 is secured at 12.; E is thepin'iformingthe innerterminal, secured in-the insulating material D, which does notrub ofi on the terminal is usually plaster-'of-pari's, although othermaterials might be used. At 6' is shown the cup=shaped end of the pin.

Inthe manufacture of the lamp after the pin is formed ina power-pressthe leading-inwire B is drawn through the hole e and into the cup-shapedextremity e of the pin,'the latter being embedded during the process inthe plaster-oflparis D. The cup aifords a ready means of-secnring thelead-in wire in place,'as the solder is held conveniently and of thelampsocket.

What I claim as new, and desire to secure by Letters Patentof the UnitedStates, is-

1. ,A center contact for lamp-bases, which consists of a sheet-metalstrip which is doubled upon itself, one end of the contact being closedand the other being-open.

2. A center contact for lamp-bases, which consists of .a sheet-metalstrip which is doubled upon itself, one end of the contact being open,and the adjacentparts of the contact .whichform the open end beingflared away from each other so that the contact can be anchored in theinsulatingmaterial of the lampbase. 3; A center contact for lamp-bases,which consists ,of a hollow cylinder having'a closed end which hasaninward depression, and a j perforation through the depression for the.lead-in wire, the depression serving to receive the solder for the leadiniwire, so that the-solder will not wear ofi? against the centerterminalof a lamp-socket,

n 4. A center'- contact for lamp-bases, which consists of a sheet-metalstrip doubled upon itself, one end of the contact being closedand havinga perforation for the reception asshown,

of the lead-in .wire', and the. other end of the contact being open andprovided with flared edges, whereby the contact can be anchored in theinsulating material of the lamp-base.

5. A center contact for lamp-bases, which consists of a sheet-metalstrip doubled upon itself, one end of. the contact being closed andhaving an inward depression for the reception. of solder and aperforation through I the depressed portion for the receptionof the;

lead-in wire, and the other end of the contact being open wardly,whereby the contact can be anchored in the insulating material of alamp-base.

6. A lamp-terminal piece of sheet metal forming a hollow cylinder with aperforatedcup-shaped depression at one end for the reception of alead-wire and the solder for attaching the latter to the terminal.

7. A lamp-terminal. consisting of a single strip of sheet metalsemicircular-1y curved, and doubled upon itself inder having an open andclosed end.

8. A lamp-terminal consisting of a single strip of sheet metalsemicireularly curved, and doubled upon itself to form a hollow cylinderhaving a closed end and an open end with flaring edges formed of theends of the strip.

9. A lamp-terminal consisting of a single and the adjacent parts flaredoutconsisting of a single,

to form a hollow cylstrip of sheet metal semicircularly curved, anddoubled upon itself to form a hollow cylinder having an open end and aclosed end formed with an inwardly-extending depression pierced for thepassage of a lead-wire.

10. A lamp-terminal consisting of a single strip of sheet metalsemicireularly curved, and doubled upon itself to form a hollow cylinderhaving an open end with flaring edges formed of the ends of the strip,and a closed end formed with an inwardly-extending depression piercedfor the passage of a leadwire.

In witness whereof I have hereunto set my hand this 17th day of June,1898.

GEORGE B. PAINTER.

Witnesses:

B. B.- HULL, C. L. HAYNES.

